Portable crosscut-saw.



PATENTED OGT. 29. 1907.

A. SCHUBERT. PORTABLE GROSSCUT SAW.

APPLIUATION FILED JULYID. 1904.

IIIl-IIHIIIIID| CCCCCCCCC C C C CCCCC/MACCCCC c Q w UNITED AUGUST SCHUBERT, OF SNOHOMISH, WASHINGTON.

PORTABLE CROSSCUT-SAW.

Specification of Letters Patent.

Patented Oct. 29, 1907..

Application filed July 19. 1904. Serial No. 217.259.

To all whom it 'may concern:

Be it known that AUG Us'r SCHUBERT, a citizen of the United States, residing-at Snohomish, in the county of Snohomish and State of Washington, has invented a new and useful Portable Crosseut-Saw, of which the following is a specification. The invention relates to a portable cross cut saw.

The object of the present invention is to improve the construction of saws, and to provide a simple, inexpensive and efficient motor-actuated cross cut saw designed particularly for clearing land, and adapted to be easily handled, and .capable oi rapidly cutting down trees, cross cutting logs, and the like.

With these and other objects in view, the invention consists in the construction and novel combination and arrangement of parts, hereinafter fully described, illustrated in the' accompanying drawing, and pointed out in the claims hereto appended, it being understood that various changes in theform, proportion, size, and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages ol the invention.

ln the drawingz-Figurel is a plan view of' a portable cross cut saw, constructed in accordance with this invention. Fig. 2 is an end elevation partly in section. Fig. 3 is an enlarged longitudinal sectional view of one end of the saw. Fig. 4 is a similar' view of the other end of the saw, the teeth being omitted. Fig. 5 is an enlarged detail sectional view, illustrating the construction of the saw teeth and the guide for the same. Fig. 6 is a detail view, illustrating the arrangement of the hinged teeth or blades and the means for operating the same. Fig. 7 is an enlarged detail planview, illustrating the arrangement of the cutting edges of the saw teeth.

Like numerals of reference designate corresponding parts in all the figures of the drawing. y

l designates a frame or stock consisting of a substantially oblong metal bar and forming the blade of the saw and provided with an endless guide or way 2 for the reception of saw teeth 3 of an endless cutter or saw chain. The guide or way 2, which consists of parallel side portions and curved connecting end portions, is substantially rectangular in cross section, as clearly shown in Fig. 5 of the drawing, and is provided with a longitudinal slot 4, the sides of the guide or way having inwardly-extending side flanges 5 for engaging the teei h to retain the same in the way. The endless guide, which is located at the edges of the stock or frame, may be secured to the same byscrews 6, as illustrated in Fig. 5 ofthe drawing, or it maybe mounted on or applied to the stock or frame in any other desired manner.

The Vteeth 3 are approximately T-shaped, being provided at their inner ends with heads 7, projecting laterally beyond the plane of the shanks of the teeth and extending beneath the overhanging side flanges 5, as

clearly shown in Fig. 5. The stock or frame lios within the lateral planes of 'the chainsaw so as to travel in 'the kcrf. The outer ends or cutting portions of the teeth are tapered and beveled, the beveled faces being alternately arranged at opposite sides of the saw, but the. cutting portions of the teeth may be of any desired form, as will be readily understood. The heads, which are slightly oblong in side elevation, are rounded at their ends at 8, and are provided on their inner faces with sockets 9,-for the reception of teeth V10, of a sprocket wheelV l1, which is located at one end of the saw for actuating the endless cutter formed by the independent teeth. The sprocket wheel engages the teeth at one end of the saw, and by moving the same along the endless guide actuatcs the endless cutter, as will be readily understood. The curved .connecting portions of the endless guide or way are open at the bottom to permit the sprocket wheel 11 to mesh withthe teeth, and a curved series of anti-friction rollers 12 are located at the bottom opening of thcother curved connecting portion, as clearly shown in Fig. 4 of the drawing, for cnabli ng the teeth to pass around th(l ontcr end of the saw with a minimum amount of friction. There is comparatively little friction at the parallel longitudinal side portions of the endless guide or way, and the sprocket whccl positively carries the teeth around the inner end of the saw, while thc anti-friction devices at the outer end of the saw enable. the teeth to move around the same with but little friction. The anti-friction devices 12 may be journalcd in suitable bearings of removabhl approximately semi-circular end plates 13, as indicatcd in Figs. l `and 4 of the drawing', but any other suitable means may be employed. The saw isprovided at its inner end with an approximately U-shaped guard 14, suitably sccurcd by screws .15, or other suitable fastening dcviccs to thc saw, and adapted to prevent tho tooth from coming in contact with the operator.

The sprocket whccl is mounted on a transverse motor shaft 16, which extends from a motor 17, located at the inner end of the saw, and provided with projecting handles 18, by means of which the saw is held. Any desired form of motor may be employed for actuating the shaft 16, and as thc specific construction thereof does not constitute a portion of thc present invention, a detail description and illustration thereof is doomed unnecessary. A suitable clutch lis provided for preventing the saw from breaking, should the teeth bccomestuck. The sprocket wheel, which is loosely arranged on the motor shaft, is provided with one member 19 'of the clutch, and the other member 20, which is slidablo on the motor shaft, frictionally engages the member 19, whereby the sprocket wheel is caused to rotate with the motor shaft. The clutch members are maintained in engagement with cach other by a coiled spring. 21, and should the resistance overcome the force .of the spring, the motor will rotate independently o the sprocket wheel, as will be readily understood. The slidable member of the clutch is connected with the motor shaft 16 by a key and key-way, or other suitable means.' Any'other form of clutch may be employed for this purpose. l f

In order to hold the cross cut saw inthe kei-f, and to prevent it from tilting out of the same, the saw is provided witlna series oi hinged blades or teeth 22, arranged at the side faces of the stock or frame at a longitudinal slot or opening 23, and adapted to be swung inward and outward to cause them to lie eith r within the longitudinal opening or to project beyond the plane oi the side aces of the stock or frame for engaging the walls `oi the ker. The teeth or blades 22 have tapered engaging ends, and are provided at their other ends with hinged leaves or sections 24, which are suitably secured to the stock or frame, but the blades or teeth may be hingedly mounted on the saw in any other desired manner, They are designed to extend outward atan angle away from the cutting edge of the saw so as to prevent the saw from falling out of a cut, vand also to permit the saw to feed inwardly. The hinged blades are controlled by a longitudinally movable operating rod 25, mounted in suitable guides 26,` and connected by opposite links 27 with the hinged blades. The links diverge from the operating rod, as clearly shown in Fig. 6, and they are pivotally connected with the rod` and with the blades, whereby, when the rod is moved longitudinally towards the outer' end oi the saw,Y the l blades or teeth will be swung outwardly7 and .when the rod is moved in the opposite direction the blades or teeth Will be drawn inwardly; The inner end of the operating rod isl extended at right angles to form a handle 28, which extends beyond the slot 23, and by'. means of which the rod is readily operated,

Having thus fully described my invention, what 'I claim as new, and desire to secure by Letters Patent,

1. A portable cross cut saw provided with chain saw mechanism and adapted to be carried by hand and held in any desired position, said cross cut saw comprising in its entirety a chain saw, a substantially oblongvstock oir-frame having the chain saw mounted von it and lying Within the lateral planes of the same so as to 'travel in the ker, a motor also carried by 'the stock and located at one end thereof and a projecting handle at said end of tbe'frame.

2. A portable cross cut saw provided with chain saw mechanism and adapted to be carried by hand and held in any desired position, said cross cut saw comprising in its entirety a chain Saw, a substantially oblong stock or frame having the chain saw mounted on it and lying Within the lateral planes of vthe same so as to 'travel in the kerf, a motor also carried by the stock or frame and located at one end thereof, and handles or grlpsextending beyond and carried by the motor.

3, A portable cross cut saw provided with chain saw mechanism and adapted t0 be carried by hand and heldin any desired position, saldcross cut saw comprising in its entirety a chainsaw, a Substantially oblong stock or frame having-the chainsaw mounted on it and lying within the lateral planes'of the same. so as to haver in thekerr, a

motor also carried by the stock or frame and located at one end thereof and laterally oiset from the plane of the chain saw mechanism, and a projecting handle at said end of the frame.

4. Av portable cross cut mechanism and adapted to be carried by hand and held in any desired positornsaid cross cut saw comprising in its entirety a chain saw, a substantially oblong stoel; or frame having the chain` saw mounted ou it and lying within the lateral planes ot' thesame so as to travel in the hert, a transverse shaft/carrying Va gear for actuating the chain saw mechanism, a motor mounted on the shat't and at one end of the stock or frame and offset laterally from the plane of the chain saw mechanism, and a projecting handle at said end of the frame.

5. A portable cross cut saw provided with chain mechanism and adapted to be carried by hand and held in any desired position, said cross cut saw mechanism comprising in its entirety a chain saw, a substantially oblong stock or frame having the chain'sa'w mounted on it and lying within the lateral planes of the same so as to travel in the kerf,' a sprocket wheel around which the chainsaw passes, a`

transverse shaft mounted in the stock or frame und lcarryi ing the sprocket Wheel, said shaft being extended at oneg side of the stock or frame, a motor mounted onftherexl' tended end of the said shai't, and a projectingqli n'dle'at said end of the'frame. v

'6. A portable cross cut saw provided with chain saw mechanism and adapted to be carried by hand arid'held in any desired position, said cross cut saw comprising in its entirety a chain saw, a substantially oblong stock or frame having the chain saw mounted on it and ly'ung within the lateral planes of the same so as to travel inl the kei-f, a motor also carried by the stock or frame and -located at one end thereof, a guard around the chain saw at one end ot' the stock or frame and covering the teeth thereof, and handles or grips projecting from said end of the frame.

7. A saw provided with means for engaging the wall of a. kerf for holdiugthe saw in the same.,

8. A saw provided with means for engaging the wall of a kerf, said means being movable inward and outward.

D. A saw provided in rear of its cutting edge with a tooth or blade movable inward and' outward and adapted to engage the wall of a kerf for holding the saw therein, and means for operating the tooth or blade.

10. A saw provided with a hinged tooth or blade movable inward and outward and adapted to engage the wall of a kerf, and operating mechanism connected with the tooth or blade.

11. A saw provided at opposite sides with teeth or bladesV movable inward and outward for engaging` the wall 'ot' a kerf,'an operating rod, and means carried by the operating rod for moving the blades or teeth inward or outward. l

12. A saw provided at oppositie sides with hinged blades or teeth movable inward and outward, a rod arranged between the blades or teeth, and links connecting the rods with the blades or teeth.

witnesses.

AUGUST SCHUBERT.

Witnesses:

J. V. BOWEN, CEAS. F. MonHmNG. 

